Seeds of South Australia
Ptilotus chamaecladus (Amaranthaceae)
Ground Mulla Mulla
List of species for Ptilotus
Display more images
Click on an image to enlarge it
Seed collecting:
September to January
Herbarium region:
North Western
NRM region:
Alinytjara Wilurara
IBRA region
Maralinga (GVD03)Great Victoria Desert
 Rare   (IUCN: )   [Western Australian species]
RSCA map:
Regional Species Conservation Assessments per IBRA subregion. Please click the thumbnail map.
AVH map:
Australian distribution map (external link)
SA Census:
Census of South Australian plants (external link)     [genus Ptilotus]
Name derivation:
Ptilotus from the Greek 'ptilotos' meaning feathered or winged; referring to the hairy flowers. Chamaecladus from the Greek 'chamai' meaning ground and 'klados' meaning branch; referring to its low growing habit.
Distribution:
Only one record from the western part of South Australia at Serpentine Lakes, growing on clay, loam and alluvium soils in floodplains, creek beds and claypans. Also found in Western Australia.
Status:
Native. Rare in South Australia. Common in Western Australia.
Plant description:
Prostrate spreading to ascending annual herb to 5 cm high and 60 cm wide. Leaves ovate, to 130 mm long and 48 mm wide. Inflorescence ovoid, to 60 mm long and 20 mm wide with white-pink-red flowers covered in dense hairs. Flowering between July and December.
Fruit type:
Ovoid head containing numerous long papery and hairy fruits, each containing one seed.
Seed type:
Light brown globular-reniform seed to 1.2 mm long and 1 mm wide.
Embryo type:
Peripheral.
Seed collecting:
Be very careful when collecting this species as the fruits contain fine hairs that may cause an allergic reaction for some people. Collect the fruit heads when dried to a pale straw colour. Each fruit should come off the head easily when fingers are rubbed up the stem. Collect more fruits than required as not all fruits will have a viable seed.
Seed cleaning:
Be very careful when cleaning this species as the fruits contain fine hairs that may cause an allergic reaction for some people. To clean, rub the fruit heads gently to dislodge the seed at the base of each fruit. Use a sieve to separate the unwanted material. Store the seeds with a desiccant such as dried silica beads or dry rice, in an air tight container in a cool and dry place.
Seed viability:
From one collection, the seed viability was average, at 65%.
Seed germination:
Seeds are non-dormant, viable seed should germinate readily.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
Oct-152%14 dNA
1% agar;
Incubated under spring/autumn conditions
Oct-152%14 dNA
1% agar;
Incubated under winter conditions
Result: Maximum percentage of germination observed.
T0: Number of days before first germinant observed.
T50: Number of days to achieve 50% germination.
Pre-treatment: The initial treatment that the seeds received prior to placement on germination media.
Germination medium: The substrate that seeds were placed on for the duration of the germination experiment.
Incubator conditions:
Photoperiod: The duration of light exposure that the seeds were subject to during a 24 hour period.
Thermoperiod: The constant or diurnal temperatures that seeds were subject to during a 24 hour period.
Winter conditions: 15°C 20 h (3am→11pm); 5°C 4 h (11pm→3am) / 10 h light (8am→6pm); 14 h dark (6pm→8am)
Spring/Autumn conditions: 22°C 12 h (8am→8pm); 10°C 12 h (8pm→8am) / 12 h light (8am→8pm); 12 h dark (8pm→8am)
Summer conditions: 30°C 14 h (6am→8pm); 15°C 10 h (8pm→6am) / 14 h light (6am→8pm); 10 h dark (8pm→6am)